int read_file(char *filepath, int action, unsigned int *value)
{
int num_line = 0;
FILE *fp;
switch (action)
{
case GET_SHARES:
*value = read_shares_file(filepath);
if (*value == -1)
return -1;
break;
case GET_TASKS:
fp = fopen (filepath, "r");
if (fp == NULL)
error_function("Could not open file", filepath);
while (fgets(target, LINE_MAX, fp) != NULL)
num_line++;
*value = (unsigned int)num_line;
if (fclose (fp))
error_function ("Could not close file", filepath);
break;
default:
error_function("Wrong action type passed to fun read_file for ", filepath);
break;
}
return 0;
}
int main(int argc, char* argv[])
{
int test_num;
int task_num;
int len;
int num_cpus; /* Total time = TIME_INTERVAL *num_cpus in the machine */
char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
char mysharesfile[FILENAME_MAX], ch;
/* Following variables are to capture parameters from script*/
char *group_num_p, *mygroup_p, *script_pid_p, *num_cpus_p, *test_num_p, *task_num_p;
gid_t mygroup_num; /* A number attached with a group*/
int fd; /* A descriptor to open a fifo for synchronized start*/
int counter =0; /* To take n number of readings*/
double total_cpu_time, /* Accumulated cpu time*/
delta_cpu_time, /* Time the task could run on cpu(s) (in an interval)*/
prev_cpu_time=0;
double exp_cpu_time; /* Expected time in % as obtained by shares calculation */
struct rusage cpu_usage;
unsigned long int mygroup_shares;
time_t current_time, prev_time, delta_time;
unsigned int fmyshares, num_tasks;/* f-> from file. num_tasks is tasks in this group*/
struct sigaction newaction, oldaction;
mygroup_num = -1;
num_cpus = 0;
task_num = 0;
test_num = 0;
/* Signal handling for alarm*/
sigemptyset (&newaction.sa_mask);
newaction.sa_handler = signal_handler_alarm;
newaction.sa_flags=0;
sigaction (SIGALRM, &newaction, &oldaction);
/* Collect the parameters passed by the script */
group_num_p = getenv("GROUP_NUM");
mygroup_p = getenv("MYGROUP");
script_pid_p = getenv("SCRIPT_PID");
num_cpus_p = getenv("NUM_CPUS");
test_num_p = getenv("TEST_NUM");
task_num_p = getenv("TASK_NUM");
/* Check if all of them are valid */
if ((test_num_p != NULL) && (((test_num =atoi(test_num_p)) <= 10) && ((test_num =atoi(test_num_p)) >= 9)))
{
if ((group_num_p != NULL) && (mygroup_p != NULL) && \
(script_pid_p != NULL) && (num_cpus_p != NULL) && (task_num_p != NULL))
{
mygroup_num = atoi(group_num_p);
scriptpid = atoi(script_pid_p);
num_cpus = atoi (num_cpus_p);
task_num = atoi (task_num_p);
sprintf(mygroup,"%s", mygroup_p);
}
else
{
tst_brkm (TBROK, cleanup, "Invalid other input parameters\n");
}
}
else
{
tst_brkm (TBROK, cleanup, "Invalid test number passed\n");
}
/*
* Let us give the default group 100 shares, as other groups will have
* a multiple of 100 shares.
* WARN: For large num of groups this may hit MAX_SHARES
*/
mygroup_shares = mygroup_num * 100;
sprintf(mytaskfile, "%s", mygroup);
strcat (mytaskfile,"/tasks");
sprintf(mysharesfile, "%s", mygroup);
strcat (mysharesfile,"/cpu.shares");
/* Need some technique so as only 1 task per grp writes to shares file */
if (test_num == 9)
write_to_file (mysharesfile, "w", mygroup_shares); /* Write the shares of the group*/
write_to_file (mytaskfile, "a", getpid()); /* Assign the task to it's group*/
fd = open ("./myfifo", 0);
if (fd == -1)
{
tst_brkm (TBROK, cleanup, "Could not open fifo for synchronization");
}
read (fd, &ch, 1); /* To block all tasks here and fire them up at the same time*/
/*
* We now calculate the expected % cpu time of this task by getting
* it's group's shares, the total shares of all the groups and the
* number of tasks in this group.
*/
FLAG = 0;
total_shares = 0;
shares_pointer = &total_shares;
len = strlen (path);
if (!strncpy (fullpath, path, len))
tst_brkm (TBROK, cleanup, "Could not copy directory path %s ", path);
if (scan_shares_files(shares_pointer) != 0)
tst_brkm (TBROK, cleanup, "From function scan_shares_files in %s ", fullpath);
/* return val: -1 in case of function error, else 2 is min share value */
if ((fmyshares = read_shares_file(mysharesfile)) < 2)
tst_brkm (TBROK, cleanup, "in reading shares files %s ", mysharesfile);
if ((read_file (mytaskfile, GET_TASKS, &num_tasks)) < 0)
tst_brkm (TBROK, cleanup, "in reading tasks files %s ", mytaskfile);
exp_cpu_time = (double)(fmyshares * 100) /(total_shares * num_tasks);
prev_time = time (NULL); /* Note down the time*/
while (1)
{
/* Need to run some cpu intensive task, which also frequently checks the timer value*/
double f = 274.345, mytime; /*just a float number to take sqrt*/
alarm (TIME_INTERVAL);
timer_expired = 0;
while (!timer_expired) /* Let the task run on cpu for TIME_INTERVAL*/
f = sqrt (f*f); /* Time of this operation should not be high otherwise we can
* exceed the TIME_INTERVAL to measure cpu usage
*/
current_time = time (NULL);
delta_time = current_time - prev_time; /* Duration in case its not exact TIME_INTERVAL*/
getrusage (0, &cpu_usage);
total_cpu_time = (cpu_usage.ru_utime.tv_sec + cpu_usage.ru_utime.tv_usec * 1e-6 + /* user time*/
cpu_usage.ru_stime.tv_sec + cpu_usage.ru_stime.tv_usec * 1e-6) ; /* system time*/
delta_cpu_time = total_cpu_time - prev_cpu_time;
prev_cpu_time = total_cpu_time;
prev_time = current_time;
/* calculate % cpu time each task gets */
if (delta_time > TIME_INTERVAL)
mytime = (delta_cpu_time * 100) / (delta_time * num_cpus);
else
mytime = (delta_cpu_time * 100) / (TIME_INTERVAL * num_cpus);
fprintf (stdout,"Grp:-%3d task-%3d:CPU TIME{calc:-%6.2f(s)i.e. %6.2f(%%) exp:-%6.2f(%%)}\
with %3u shares in %lu (s) INTERVAL\n",mygroup_num, task_num, delta_cpu_time, mytime,\
exp_cpu_time, fmyshares, delta_time);
counter++;
if (counter >= NUM_INTERVALS) /* Take n sets of readings for each shares value*/
{
switch (test_num)
{
case 9: /* Test 09 */
exit (0); /* This task is done with its job*/
break;
case 10: /* Test 10 */
exit (0); /* This task is done with its job*/
break;
default:
tst_brkm (TBROK, cleanup, "Invalid test number passed\n");
break;
} /* end switch*/
} /* end if*/
} /* end while*/
} /* end main*/
int main(int argc, char *argv[])
{
int test_num, task_num, len, num_cpus;
char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
char mysharesfile[FILENAME_MAX], ch;
/* Following variables are to capture parameters from script */
char *group_num_p, *mygroup_p, *script_pid_p, *num_cpus_p;
char *test_num_p, *task_num_p;
pid_t pid;
gid_t mygroup_num; /* A number attached with a group */
int fd; /* to open a fifo to synchronize */
int counter = 0; /* To take n number of readings */
double total_cpu_time, /* Accumulated cpu time */
delta_cpu_time, /* Time the task could run on cpu(s) */
prev_cpu_time = 0;
double exp_cpu_time; /* Exp time in % by shares calculation */
struct rusage cpu_usage;
time_t current_time, prev_time, delta_time;
unsigned int fmyshares, num_tasks;
struct sigaction newaction, oldaction;
mygroup_num = -1;
num_cpus = 0;
task_num = 0;
test_num = 0;
/* Signal handling for alarm */
sigemptyset(&newaction.sa_mask);
newaction.sa_handler = signal_handler_alarm;
newaction.sa_flags = 0;
sigaction(SIGALRM, &newaction, &oldaction);
/* Collect the parameters passed by the script */
group_num_p = getenv("GROUP_NUM");
mygroup_p = getenv("MYGROUP");
script_pid_p = getenv("SCRIPT_PID");
num_cpus_p = getenv("NUM_CPUS");
test_num_p = getenv("TEST_NUM");
task_num_p = getenv("TASK_NUM");
/* Check if all of them are valid */
if ((test_num_p != NULL) && (((test_num = atoi(test_num_p)) <= 8) &&
((test_num = atoi(test_num_p)) >= 6))) {
if ((group_num_p != NULL) && (mygroup_p != NULL) &&
(script_pid_p != NULL) && (num_cpus_p != NULL) &&
(task_num_p != NULL)) {
mygroup_num = atoi(group_num_p);
scriptpid = atoi(script_pid_p);
num_cpus = atoi(num_cpus_p);
task_num = atoi(task_num_p);
sprintf(mygroup, "%s", mygroup_p);
} else {
tst_brkm(TBROK, cleanup,
"Invalid other input parameters\n");
}
} else {
tst_brkm(TBROK, cleanup, "Invalid test number passed\n");
}
sprintf(mytaskfile, "%s", mygroup);
sprintf(mysharesfile, "%s", mygroup);
strcat(mytaskfile, "/tasks");
strcat(mysharesfile, "/cpu.shares");
pid = getpid();
write_to_file(mytaskfile, "a", pid); /* Assign task to it's group */
fd = open("./myfifo", 0);
if (fd == -1)
tst_brkm(TBROK, cleanup, "Could not open fifo synchronize");
read(fd, &ch, 1); /* Block task here to synchronize */
/*
* We need not calculate the expected % cpu time of this task, as
* neither it is required nor it can be predicted as there are idle
* system tasks (and others too) in this group.
*/
FLAG = 0;
total_shares = 0;
shares_pointer = &total_shares;
len = strlen(path);
if (!strncpy(fullpath, path, len))
tst_brkm(TBROK, cleanup,
"Could not copy directory path %s ", path);
if (scan_shares_files(shares_pointer) != 0)
tst_brkm(TBROK, cleanup,
"From function scan_shares_files in %s ", fullpath);
/* return val -1 in case of function error, else 2 is min share value */
if ((fmyshares = read_shares_file(mysharesfile)) < 2)
tst_brkm(TBROK, cleanup,
"in reading shares files %s ", mysharesfile);
if ((read_file(mytaskfile, GET_TASKS, &num_tasks)) < 0)
tst_brkm(TBROK, cleanup,
"in reading tasks files %s ", mytaskfile);
exp_cpu_time = (double)(fmyshares * 100) / (total_shares * num_tasks);
prev_time = time(NULL); /* Note down the time */
while (1) {
/*
* Need to run some cpu intensive task, which also
* frequently checks the timer value
*/
double f = 274.345, mytime; /*just a float number for sqrt */
alarm(TIME_INTERVAL);
timer_expired = 0;
/*
* Let the task run on cpu for TIME_INTERVAL. Time of this
* operation should not be high otherwise we can exceed the
* TIME_INTERVAL to measure cpu usage
*/
while (!timer_expired)
f = sqrt(f * f);
current_time = time(NULL);
/* Duration in case its not exact TIME_INTERVAL */
delta_time = current_time - prev_time;
getrusage(0, &cpu_usage);
/* total_cpu_time = total user time + total sys time */
total_cpu_time = (cpu_usage.ru_utime.tv_sec +
cpu_usage.ru_utime.tv_usec * 1e-6 +
cpu_usage.ru_stime.tv_sec +
cpu_usage.ru_stime.tv_usec * 1e-6);
delta_cpu_time = total_cpu_time - prev_cpu_time;
prev_cpu_time = total_cpu_time;
prev_time = current_time;
/* calculate % cpu time each task gets */
if (delta_time > TIME_INTERVAL)
mytime = (delta_cpu_time * 100) /
(delta_time * num_cpus);
else
mytime = (delta_cpu_time * 100) /
(TIME_INTERVAL * num_cpus);
/* No neeed to print the results */
fprintf(stdout, "Grp:-%3d task-%3d:CPU TIME{calc:-%6.2f(s)"
" i.e. %6.2f(%%) exp:-%6.2f(%%)} in %lu (s)\n",
mygroup_num, task_num, delta_cpu_time, mytime,
exp_cpu_time, delta_time);
counter++;
if (counter >= NUM_INTERVALS) {
switch (test_num) {
case 6: /* Test 06 */
case 7: /* Test 07 */
case 8: /* Test 08 */
exit(0); /* This task is done */
break;
default:
tst_brkm(TBROK, cleanup,
"Invalid test num passed\n");
break;
} /* end switch */
} /* end if */
} /* end while */
} /* end main */
int main(int argc, char *argv[])
{
int num_cpus, test_num, len; /* Total time = TIME_INTERVAL*num_cpus*/
char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
char mysharesfile[FILENAME_MAX], ch;
pid_t pid;
int my_group_num; /* A number attached with a group*/
int fd; /* To open a fifo for synchronization*/
int first_counter = 0; /* To take n number of readings*/
int second_counter = 0; /* no of times shares have changed*/
double total_cpu_time; /* Accumulated cpu time*/
double delta_cpu_time; /* Time the task could run on cpu(s)*/
double prev_cpu_time = 0;
double exp_cpu_time; /* Exp time in % by shares calculation*/
struct rusage cpu_usage;
time_t current_time, prev_time, delta_time;
unsigned long int myshares = 2, baseshares = 1000;
unsigned int fmyshares, num_tasks;
struct sigaction newaction, oldaction;
num_cpus = 0;
test_num = 0;
my_group_num = -1;
/* Signal handling for alarm*/
sigemptyset(&newaction.sa_mask);
newaction.sa_handler = signal_handler_alarm;
newaction.sa_flags = 0;
sigaction(SIGALRM, &newaction, &oldaction);
/* Check if all parameters passed are correct*/
if ((argc < 5) || ((my_group_num = atoi(argv[1])) <= 0) || \
((scriptpid = atoi(argv[3])) <= 0) || \
((num_cpus = atoi(argv[4])) <= 0) || \
(test_num = atoi(argv[5])) <= 0)
tst_brkm(TBROK, cleanup, "Invalid input parameters\n");
if (test_num == 1)
myshares *= my_group_num;
else if (test_num == 3)
myshares = baseshares;
else
tst_brkm(TBROK, cleanup, "Wrong Test num passed. Exiting.\n");
sprintf(mygroup, "%s", argv[2]);
sprintf(mytaskfile, "%s", mygroup);
sprintf(mysharesfile, "%s", mygroup);
strcat(mytaskfile, "/tasks");
strcat(mysharesfile, "/cpu.shares");
pid = getpid();
write_to_file(mytaskfile, "a", pid); /* Assign task to it's group*/
write_to_file(mysharesfile, "w", myshares);
dbg("Default task's initial shares = %u", myshares);
fd = open("./myfifo", 0);
if (fd == -1)
tst_brkm(TBROK, cleanup, "Could not open fifo to synchronizae");
read(fd, &ch, 1); /* To fire all the tasks up at the same time*/
/*
* We need not calculate the expected % cpu time of this task, as
* neither it is required nor it can be predicted as there are idle
* system tasks (and others too) in this group.
*/
FLAG = 0;
total_shares = 0;
shares_pointer = &total_shares;
len = strlen(path);
if (!strncpy(fullpath, path, len))
tst_brkm(TBROK, cleanup,
"Could not copy directory path %s ", path);
if (scan_shares_files(shares_pointer) != 0)
tst_brkm(TBROK, cleanup,
"From function scan_shares_files in %s ", fullpath);
/* return val -1 in case of function error, else 2 is min share value */
if ((fmyshares = read_shares_file(mysharesfile)) < 2)
tst_brkm(TBROK, cleanup,
"in reading shares files %s ", mysharesfile);
if ((read_file(mytaskfile, GET_TASKS, &num_tasks)) < 0)
tst_brkm(TBROK, cleanup,
"in reading tasks files %s ", mytaskfile);
exp_cpu_time = (double)(fmyshares * 100) / (total_shares * num_tasks);
prev_time = time(NULL); /* Note down the time*/
while (1) {
/*
* Need to run some cpu intensive task, which also
* frequently checks the timer value
*/
double f = 274.345, mytime; /*just a float number for sqrt*/
alarm(TIME_INTERVAL);
timer_expired = 0;
/*
* Let the task run on cpu for TIME_INTERVAL. Time of this
* operation should not be high otherwise we can exceed the
* TIME_INTERVAL to measure cpu usage
*/
while (!timer_expired)
f = sqrt(f * f);
current_time = time(NULL);
/* Duration in case its not exact TIME_INTERVAL*/
delta_time = current_time - prev_time;
getrusage(0, &cpu_usage);
/* total_cpu_time = total user time + total sys time */
total_cpu_time = (cpu_usage.ru_utime.tv_sec +
cpu_usage.ru_utime.tv_usec * 1e-6 +
cpu_usage.ru_stime.tv_sec +
cpu_usage.ru_stime.tv_usec * 1e-6) ;
delta_cpu_time = total_cpu_time - prev_cpu_time;
prev_cpu_time = total_cpu_time;
prev_time = current_time;
/* calculate % cpu time each task gets */
if (delta_time > TIME_INTERVAL)
mytime = (delta_cpu_time * 100) /
(delta_time * num_cpus);
else
mytime = (delta_cpu_time * 100) /
(TIME_INTERVAL * num_cpus);
/*
* Lets print the results. The exp cpu time calculated may not
* be correct due to running system tasks at the moment
*/
fprintf(stdout, "DEF TASK:CPU TIME{calc:-%6.2f(s)"
" i.e. %6.2f(%%) exp:-%6.2f(%%)} with %lu(shares)"
" in %lu (s) INTERVAL\n", delta_cpu_time, mytime,
exp_cpu_time, myshares, delta_time);
first_counter++;
/* Take n sets of readings for each shares value*/
if (first_counter >= NUM_INTERVALS) {
first_counter = 0;
second_counter++;
if (second_counter >= NUM_SETS)
exit(0); /* This task is done */
/* Keep same ratio but change values*/
if (test_num == 1) {
myshares = MULTIPLIER * myshares;
write_to_file(mysharesfile, "w", myshares);
}
/* No need to change shares for def task for test 3 */
}/* end if*/
}/* end while*/
}/* end main*/
int main(int argc, char *argv[])
{
int num_cpus;
int test_num;
int len; /* Total time = TIME_INTERVAL *num_cpus in the machine */
char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
char mysharesfile[FILENAME_MAX], ch;
pid_t pid;
gid_t my_group_num; /* A number attached with a group */
int fd; /* A descriptor to open a fifo for synchronized start */
int first_counter = 0; /* To take n number of readings */
int second_counter = 0; /* To track number of times the base value of shares has been changed */
double total_cpu_time, /* Accumulated cpu time */
delta_cpu_time, /* Time the task could run on cpu(s) (in an interval) */
prev_cpu_time = 0;
double exp_cpu_time; /* Expected time in % as obtained by shares calculation */
struct rusage cpu_usage;
time_t current_time, prev_time, delta_time;
unsigned long int myshares = 2, baseshares = 1000; /* Simply the base value to start with */
unsigned int fmyshares, num_tasks; /* f-> from file. num_tasks is tasks in this group */
struct sigaction newaction, oldaction;
my_group_num = -1;
num_cpus = 0;
test_num = 0;
/* Signal handling for alarm */
sigemptyset(&newaction.sa_mask);
newaction.sa_handler = signal_handler_alarm;
newaction.sa_flags = 0;
sigaction(SIGALRM, &newaction, &oldaction);
/* Check if all parameters passed are correct */
if ((argc < 5) || ((my_group_num = atoi(argv[1])) <= 0)
|| ((scriptpid = atoi(argv[3])) <= 0)
|| ((num_cpus = atoi(argv[4])) <= 0)
|| (test_num = atoi(argv[5])) <= 0) {
tst_brkm(TBROK, cleanup, "Invalid input parameters\n");
}
if (test_num == 1) /* Test 01 & Test 02 */
myshares *= my_group_num;
else if (test_num == 3) /* Test 03 */
myshares = baseshares;
else {
tst_brkm(TBROK, cleanup,
"Wrong Test number passed. Exiting Test...\n");
}
sprintf(mygroup, "%s", argv[2]);
sprintf(mytaskfile, "%s", mygroup);
sprintf(mysharesfile, "%s", mygroup);
strcat(mytaskfile, "/tasks");
strcat(mysharesfile, "/cpu.shares");
pid = getpid();
write_to_file(mytaskfile, "a", pid); /* Assign the task to it's group */
write_to_file(mysharesfile, "w", myshares);
fd = open("./myfifo", 0);
if (fd == -1) {
tst_brkm(TBROK, cleanup,
"Could not open fifo for synchronization");
}
fprintf(stdout, "\ntask-%d SHARES=%lu\n", my_group_num, myshares);
read(fd, &ch, 1); /* To block all tasks here and fire them up at the same time */
/*
* We now calculate the expected % cpu time of this task by getting
* it's group's shares, the total shares of all the groups and the
* number of tasks in this group.
*/
FLAG = 0;
total_shares = 0;
shares_pointer = &total_shares;
len = strlen(path);
if (!strncpy(fullpath, path, len))
tst_brkm(TBROK, cleanup, "Could not copy directory path %s ",
path);
if (scan_shares_files(shares_pointer) != 0)
tst_brkm(TBROK, cleanup,
"From function scan_shares_files in %s ", fullpath);
/* return val: -1 in case of function error, else 2 is min share value */
if ((fmyshares = read_shares_file(mysharesfile)) < 2)
tst_brkm(TBROK, cleanup, "in reading shares files %s ",
mysharesfile);
if ((read_file(mytaskfile, GET_TASKS, &num_tasks)) < 0)
tst_brkm(TBROK, cleanup, "in reading tasks files %s ",
mytaskfile);
exp_cpu_time = (double)(fmyshares * 100) / (total_shares * num_tasks);
prev_time = time(NULL); /* Note down the time */
while (1) {
/* Need to run some cpu intensive task, which also frequently checks the timer value */
double f = 274.345, mytime; /*just a float number to take sqrt */
alarm(TIME_INTERVAL);
timer_expired = 0;
while (!timer_expired) /* Let the task run on cpu for TIME_INTERVAL */
f = sqrt(f * f); /* Time of this operation should not be high otherwise we can
* exceed the TIME_INTERVAL to measure cpu usage
*/
current_time = time(NULL);
delta_time = current_time - prev_time; /* Duration in case its not exact TIME_INTERVAL */
getrusage(0, &cpu_usage);
total_cpu_time = (cpu_usage.ru_utime.tv_sec + cpu_usage.ru_utime.tv_usec * 1e-6 + /*user */
cpu_usage.ru_stime.tv_sec + cpu_usage.ru_stime.tv_usec * 1e-6); /*sys */
delta_cpu_time = total_cpu_time - prev_cpu_time;
prev_cpu_time = total_cpu_time;
prev_time = current_time;
/* calculate % cpu time each task gets */
if (delta_time > TIME_INTERVAL)
mytime =
(delta_cpu_time * 100) / (delta_time * num_cpus);
else
mytime =
(delta_cpu_time * 100) / (TIME_INTERVAL * num_cpus);
fprintf(stdout, "task-%d:CPU TIME{calc:-%6.2f(s)i.e. %6.2f(%%) exp:-%6.2f(%%)}\
with %lu(shares) in %lu (s) INTERVAL\n", my_group_num, delta_cpu_time, mytime,
exp_cpu_time, myshares, delta_time);
first_counter++;
if (first_counter >= NUM_INTERVALS) { /* Take n sets of readings for each shares value */
first_counter = 0;
second_counter++;
if (second_counter >= NUM_SETS)
exit(0); /* This task is done with its job */
/* Change share values depending on the test_num */
if (test_num == 1) {
/* Keep same ratio but change values */
myshares = MULTIPLIER * myshares;
} else {
/* Increase for odd task and decrease for even task */
if (my_group_num % 2)
myshares +=
baseshares * GRANULARITY / 100;
else
myshares -=
baseshares * GRANULARITY / 100;
}
write_to_file(mysharesfile, "w", myshares);
if (test_num == 3) {
/*
* Read the shares file and again calculate the cpu fraction
* No need to read tasks file as we do not migrate tasks
* No need to scan all shares file as total shares are const
*/
if ((fmyshares =
read_shares_file(mysharesfile)) < 2)
tst_brkm(TBROK, cleanup,
"in reading shares files %s ",
mysharesfile);
exp_cpu_time =
(double)(fmyshares * 100) / (total_shares *
num_tasks);
}
fprintf(stdout, "\ntask-%d SHARES=%lu\n", my_group_num,
myshares);
} /* end if */
} /* end while */
} /* end main */
/*
* Function: scan_shares_file()
* This function scans all the shares files under the mountpoint
* of the controller and returns the total added shares of all
* the groups (currently excludes default group) ??
*/
int scan_shares_files(unsigned int *shares_pointer)
{
struct stat statbuffer;
DIR *dp;
char *path_pointer;
/*
* Check if we can get stat of the file
*/
if (lstat (fullpath, &statbuffer) < 0)
error_function("Can not read stat for file ", fullpath);
if (S_ISDIR (statbuffer.st_mode) == 0) /* not a directory */
{
/*
* We run all user tasks in the created groups and not default groups. So
* exclude the shares of default group. FLAG to ensure dir_pointer is non NULL
*/
if ((FLAG == 1) && (strcmp(fullpath, "/dev/cpuctl/cpu.shares") != 0) &&\
(strcmp (dir_pointer->d_name, "cpu.shares") == 0))
{
*shares_pointer += read_shares_file (fullpath);
}
return 0;
}
/*
* Now it's a directory. let the path_pointer point to the end
* of fullpath to append new files names
*/
path_pointer = fullpath + strlen(fullpath);
*path_pointer++ = '/';
*path_pointer = 0;
if ((dp = opendir(fullpath)) == NULL) /* Error in opening directory */
error_function("Can't open ", fullpath);
/*
* search all groups recursively and get total shares
*/
while ((dir_pointer = readdir(dp)) != NULL) /* Error in reading directory */
{
if ((strcmp(dir_pointer->d_name, ".") == 0) || (strcmp(dir_pointer->d_name, "..") == 0))
continue; /* ignore current and parent directory */
FLAG = 1;
strcpy (path_pointer, dir_pointer->d_name ); /* append name to fullpath */
if ((retval = scan_shares_files(shares_pointer)) != 0)
break;
}
/*
* This directory is searched fully. let us go back to parent directory again
*/
path_pointer[-1] = 0;
if (closedir (dp) < 0)
error_function("Could not close dir ", fullpath);
return 0;
}